JPH0417587B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides
A remote switch has been relocated to the Nile panel so that when receiving CATV and watching TV from a position a little far from the TV receiver, for example near the night panel, you can supply and stop power to the receiver at hand. The present invention relates to a television power supply control device that can be operated.

[Prior art and its drawbacks]

Generally, when powering on and off one device at two locations, conventionally three lines l1 to l3 as shown in Figure 8 were used.
It is usually called a ``3-way switch.'' In such a conventional system, changeover switches 4 and 5 are provided on the load side 2 and the remote side 3, where the load 1 is installed, respectively, to switch between them, but in this configuration, current is always applied to a part of the load. It is impossible to keep the load on standby.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and the purpose of the present invention is to enable the reception of independent broadcasts such as guides through a converter in addition to general TV broadcasts, such as hotel CATV, when the TV receiver is located far away from the TV receiver. To provide a television power control device which can be operated freely from either a remote switch or a switch provided on a converter body when it is desired to supply or stop power from a converter.

[Key points of the invention]

A remote switch unit that remotely controls the supply and termination of power to the television receiver, a converter connected to the remote switch unit via first and second power lines, and one remote control line; A television receiver is connected to a pair of power supply terminals of the converter, and a power supply is connected between the first and second power lines at the remote switch part, and the second power line and the remote control line are connected to each other. A remote switch is connected between the first power supply line and the remote control line in the converter, and a pulse shaping part that outputs a single pulse each time the remote switch is operated is connected between the first power supply line and the remote control line, and the pulse shaping part The output of the switch and the output of a switch that outputs a single pulse each time a command is given to supply or stop power to the television receiver are input to an OR circuit, and the output state of the switch is determined by receiving the output signal of the OR circuit. is provided with a holding part that is held inverted, and a switch means is connected to this holding part for controlling supply and stop of power to the television receiver according to the output state of this holding part, and the second power line is connected to one side. At the same time, the first power line was connected to the other power supply terminal via the switch means.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a television power supply control device. In FIG. 1, 11 is a remote switch section, and 12 is the remote switch section 1.
1 and three lines l1 to l3. In the remote switch section 11 mentioned above,
A power supply E of AC100V and a remote switch RSW are provided. When the remote switch RSW is closed to the contact A side, the power E is supplied through the line ll, and the remote switch RSW is connected to the contact B.
When closed to the side, power E is supplied via the line l2.

Next, the internal configuration of converter 12 will be explained. The lines l1 and l2 are connected to both ends of the relay coil 13l of the first relay 13. and,
One end of the relay switch 13S is grounded, and the other end is connected to the pulse shaping circuit 14. This pulse shaping circuit 14 has input/output characteristics as shown in FIGS. 2A and 2B, and its specific configuration will be described later with reference to FIG. 3 or 4. In other words,
The pulse shaping circuit 13 is connected to the relay switch 1.
Each time 3S is closed or opened, it outputs a single pulse as shown in FIG. 2B. The output of the pulse shaping circuit 14 is input to one end of an OR circuit 15. An operation signal from a normally open automatic recovery switch 16 is input to the other end of the OR circuit 15. When the switch 16 is open, a low level signal (ground potential) is input to the OR circuit 15, and when the switch 16 is closed, a high level signal is input to the OR circuit 15. The output of the OR circuit 15 is input to a hold circuit 17. This hold circuit 17 has input/output characteristics as shown in FIGS. 5A and 5B, and its detailed configuration will be described later with reference to FIG. 6 or 7.

Next, the output of the hold circuit 17 is connected to one end of the relay coil 18l of the second relay 18. Further, one end of the relay switch 18s of this second relay 18 is connected to the line l,
The other end is connected to the TV power supply terminal S2. Further, the line l2 is connected to the supply terminal S1.

Further, the lines l1 and l2 are connected to a channel selection/frequency conversion section 20 via a transformer 19. This channel selection/frequency conversion section 20 selects a high frequency signal input from an input terminal IN, performs frequency conversion, and outputs the resultant signal to an output terminal OUT.

Next, the detailed configuration of the pulse shaping circuit 14 will be explained with reference to FIG. This pulse shaping circuit 14 includes an exclusive OR circuit 31 to which the input signal IN is input, an exclusive OR circuit 32 to which the input signal IN and the power supply VDD are input, and an exclusive OR circuit 32 to which the output is input via a CR integration circuit. An exclusive OR circuit 33 (the power supply VDD is also input to this exclusive OR circuit 33) is provided, and the output of this exclusive OR circuit 33 is input to the exclusive OR circuit 31. With this configuration, the input signal
Only when IN changes as shown in FIG. 2A, an output signal OUT is output as shown in FIG. 2B.

Note that FIG. 4 shows another example of the pulse shaping circuit 14. This pulse shaping circuit 14
The input signal IN is connected to the AND circuit 41 and its output is
Inverter 42 input via CR integration circuit
An inverter 45 is provided, the output of the inverter 42 is fed back via an inverter 43, the input signal IN is fed back to the AND circuit 44, and the output thereof is input to the CR integration circuit. It is returning via 46. Then, the inverter 42 or 45
The outputs of are taken out as output signals OUT via diodes 47 and 48, respectively. Even with this configuration, the output signal OUT is output as shown in FIG. 2B only when the input signal IN changes as shown in FIG. 2A.

Next, the detailed configuration of the hold circuit 17 will be explained with reference to FIG. Figure 6 shows the configuration of RS flip-flops, and the input signal
IN is inputted via an inverter 51 to an RS flip-flop consisting of four NAND circuits 52-55. Then, the output of the NAND circuit 53 is output as the output signal OUT. This output signal OUT is then connected to the pace of transistor Q1,
The second transistor is connected to the collector side of the transistor Q2 whose pace is connected to the collector of the transistor Q1.
The relay coil 18l of the relay 18 is connected. In this way, by providing the RS flip-flop, each time the input signal IN is input as shown in FIG. 5A, the output signal is changed as shown in FIG. 5B.
OUT is inverted and output.

Next, another example of the hold circuit 17 will be explained with reference to FIG. Figure 7 shows the structure of a D-type flip-flop, and the input signal
IN is input to the crop terminal C of the D-type flip-flop 61. Further, the Q output of the flip-flop 61 is input to the input terminal D. Therefore, every time the input signal IN is input as shown in FIG. 5A, the output signal OUT is inverted and output as shown in FIG. 5B.

Next, the operation of an embodiment of the present invention configured as described above will be explained.

First, as shown in FIG.
It is assumed that the converter 12 is in a standby state.

First, the case where the power is turned on from the remote switch section 11 side will be described. In this case, switch the remote switch RSW from the contact B side to the contact A side. As a result, current flows through the relay coil 13l and the relay switch 13S is closed. Therefore, a single pulse is output from the pulse shaping circuit 14. This pulse is input to the hold circuit 17 via the OR circuit 15. Therefore, the second relay 18 is driven and the relay switch 18s is closed. As a result, the power source E is supplied as a power source for driving the television receiver via the supply terminals S1 and S2.

Next, a case will be described in which the power is turned off from the remote switch section 11 side. In this case, switch the remote switch RSW from the contact A side to the contact B side. This opens the relay switch 13S. Therefore, a single pulse is output from the pulse shaping circuit 14. This single pulse is passed through the OR circuit 15 to the hold circuit 17 as in the previous case.
is output to. Therefore, since the output signal of the hold circuit 17 is inverted, the driving of the second relay 18 is stopped. Therefore, relay switch 18s opens,
Power supply to the television receiver will be stopped.

Next, the case where the power is turned on and off from the converter 12 side will be explained. First, a case will be described in which the power is turned on when the relay coil 18l is not excited, that is, the power is turned off. In this case, switch 16 is turned on. Therefore, a single pulse is
The signal is output to the hold circuit 17 via. Therefore, the output of the hold circuit 17 is inverted and becomes high level. Therefore, the relay coil 18l is energized and the relay switch 18s is closed. As a result,
A power source E is supplied as a power source for driving the television receiver via supply terminals S1 and S2.

On the other hand, if it is desired to turn off the power, the switch 16 is turned on again. As a result, a single pulse is outputted to the hold circuit 17 via the OR circuit 15. Therefore, the output of the hold circuit 17 is inverted and becomes low level. Therefore, the coil 18l is no longer energized and the relay switch 1
8s opens. As a result, the supply of power to the television receiver via the supply terminals S1 and S2 is stopped.

In this way, the pulse shaping circuit 14 operates so that the same single pulse is generated whether the relay switch 13S is closed or opened by operating the remote switch RSW, and the converter 1
A kind of single pulse is generated each time the automatic reset switch 16 provided in the converter 12 is operated, so even if the remote switch RSW and the automatic reset switch 16 provided in the converter 12 are operated in alternating combination, Both single pulses are output by the OR circuit 15,
Since the signals are sequentially guided to the hold circuit 17, the output state of the hold circuit 17 is sequentially inverted by the input pulses. Therefore, both sides can freely turn on and off the power.

Note that the pulse shaping circuit 14 is not limited to the configuration shown in FIG. 3 or 4, and a microcomputer may also be used. Furthermore, the configuration of the hold circuit 17 is also explained in the sixth section.
Although shown in FIG. 7 or FIG. 7, it may be similarly realized by a microcomputer.

〔Effect of the invention〕

As described in detail above, according to the present invention, even the remote control unit can also control the TV by using the switch provided in the converter, which is used integrally with the TV receiver and is partially energized and in a standby state. It is possible to provide a television power control device that can turn on and off the power of a receiver.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a television power control device according to an embodiment of the present invention, FIGS. 2A and B are waveform diagrams showing input/output characteristics of a pulse shaping circuit, and FIGS. 3 and 4 are pulse forming circuit diagrams, respectively. Logic circuit diagram showing the configuration of the shaping circuit, Figures 5A and B are waveform diagrams showing the input/output characteristics of the hold circuit, Figures 6 and 7 are logic circuit diagrams each showing the hold circuit, and Figure 8 is the conventional one. FIG. 2 is a circuit diagram showing a television power control device of FIG. DESCRIPTION OF SYMBOLS 11...Remote switch section, 12...Converter, 13...First relay, 14...Pulse shaping circuit, 16...Auto return type switch, 17...
Hold circuit, 18... second relay.

Claims (1)

[Claims] 1. A remote switch unit that remotely controls the supply and stop of power to the television receiver, and a connection between the remote switch unit, first and second power lines, and one remote control line. a converter connected to the converter, and a television receiver connected to a pair of power supply terminals of the converter, and a power supply is connected between the first and second power lines in the remote switch section, and the A remote switch is connected between the second power supply line and the remote control line, and a single pulse is sent between the first power supply line and the remote control line in the converter each time the remote switch is operated. Connect the output pulse shaping section, and input the output of this pulse shaping section and the output of a switch that outputs a single pulse each time a command is given to supply or stop power to the television receiver to an OR circuit, respectively. A holding section is provided that receives the output signal of this OR circuit and inverts and holds the output state, and this holding section is equipped with a switch that controls the supply and stop of power to the television receiver according to the output state of this holding section. the second power line is connected to one power supply terminal, and the first power line is connected to the other power supply terminal via the switch means. Device.